XU Shiting,DONG Zhiqian,LI Gang.Seismic Design and Performance Evaluation Method for Buckling Restrained Brace Frame based on E-μ Model[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(06):1238-1247.
XU Shiting,DONG Zhiqian,LI Gang.Seismic Design and Performance Evaluation Method for Buckling Restrained Brace Frame based on E-μ Model[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(06):1238-1247. DOI: 10.13409/j.cnki.jdpme.201905042.
Seismic Design and Performance Evaluation Method for Buckling Restrained Brace Frame based on E-μ Model
Multiple nonlinear dynamic history analyses should be performed during seismic and retrofit design of steel concentrically braced frames (CBFs) replaced with buckling restrained braces (BRBs) in order to obtain the strength and stiffness of BRBs. To avoid the iterative nonlinear dynamic analysis, the ductile demand spectra of the single-degree-of-freedom CBFs and the buckling restrained brace frames (BRBFs) with different reserve parameters were firstly calculated; then the relation between equivalent energy (
E
) and ductility demand (
μ
) of BRBFs under the condition that the ductility demand meets the requirements of seismic demand, namely
E
-
μ
model, was presented. Based on this model, a novel method for seismic reinforcing design and simplified evaluation of the BRBFs was proposed. The method was applied to a 6-story braced-frame structure retrofit project and the result showed that the method proposed in this paper is accurate and applicable in design.
Gao X Y , Zhang T L , Huang H T , et al . Design method for improving seismic performance of steel frame-support structure with buckling restrained brace [J]. Journal of Beijing University of Technology , 2010 , 36 ( 9 ): 1206 - 1214 . (in Chinese)
Li P B , Lou Y , Zhao G P , et al . Braces in aseismic design for steel tower of Beijing Yintai Center [J]. Journal of Building Structures , 2007 , 37 ( 11 ): 5 - 7 . (in Chinese)
Ren Ch C , Xu Z G , Xiao C Zh , et al . Application of unbonded brace in super high-rise structure with cantilever truss [J]. Journal of Building Structures , 2013 , 43 ( 5 ): 54 - 59 . (in Chinese)
Rui M Zh , Li L Sh , He J L , et al . Study and design of high-rise steel structure office building with unbonded braces [J]. Journal of Building Structures , 2007 , 37 ( 5 ): 25 - 28 . (in Chinese)
Zhao Y , Guo Y L . Research on design method of buckling restrained braced frames [J]. Journal of Building Structures , 2010 , 40 ( 1 ): 38 - 43 . (in Chinese)
Liu J B . Research on the design theory of buckling-restrained braces and buckling-restrained braced frames [D]. Beijing : Tsinghua University , 2005 . (in Chinese)
Koetaka Y , Narihara H , Tsujita O . Exprimental study on buckling restrained braces [C]∥ Proceedings of Sixth Pacific Structural Steel Conference . Beijing : Seismological Press , 2001 : 208 - 213 .
Kim J , Choi H . Energy-based seismic design of structures with buckling-restrained braces [J]. Steel and Composite Structures , 2004 , 4 ( 6 ): 437 ⁃ 452 .
赵瑛 . 防屈曲支撑框架设计理论研究 [D]. 北京 : 清华大学 , 2009 .
Zhao Y . Research on design method of buckling restrained brace frames [D]. Beijing : Tsinghua University , 2009 . (in Chinese)
Choi H H , Kim J . Evaluation of proper supplemental damping for a multi-story steel frame using capacity spectrum method [C]∥ Proceedings of 3rd International Conference on Earthquake Resistant Engineering Structures . Malaga : WIT Press , 2001 .
Kim J , Choi H . Seismic design of buckling-restrained braces using energy-balance concept [C]∥ Proceedings of the 5th Japan-Korea-Taiwan Joint Seminar on Earthquake Engineering for Building Structures . Kyoto : Kyoto University , 2003 .
Kim J , Lee K . Optimum stiffness ratio of unbonded brace hysteretic dampers [C]∥ Proceedings of the 2nd Korea-Japan Joint Seminar on Earthquake Engineering for Building Structures . Kyoto : Kyoto University , 2000 .
Cheng G Y , Ye L P , Cui H Ch . Study on the design method of buckling-restrained brace [J]. Journal of Building Structures , 2008 , 29 ( 1 ): 40 - 48 . (in Chinese)
Chopra A K . 结构动力学:理论及其在地震工程中的应用 [M]. 谢礼立,吕大刚,译. 北京 : 高等教育出版社 , 2005 .
Chopra A K . Dynamics of structures: theory and applications to earthquake engineering [M]. Xie L L, Lyu D G.Beijing : Higher Education Press , 2005 . (in Chinese)
Li G , Fahnestock L A . Seismic response of single-degree-of-freedom systems representing low-ductility steel concentrically-braced frames with reserve capacity [J]. Journal of Structural Engineering , 2013 , 139 ( 2 ): 199 - 211 .
FEMA P695.Quantification of building seismic performance factors [R]. Redwood City CA : Applied Technology Council , 2009 .
Ma N . Seismic behavior and design method of all-steel buckling restrained braces and steel frames [D]. Harbin : Harbin Institute of Technology , 2010 . (in Chinese)
Dong Zh Q , LI G , Li H N . A simplified method for seismic performance evaluation of MDOF steel concentrically braced frames [J]. Journal of Building Structures , 2018 , 39 ( 5 ): 1 - 9 . (in Chinese)
Stoakes C D . Beam-column connection flexural behavior and seismic collapse performance of concentrically braced frames [D]. Urbana, IL : University of Illinois at Urbana-Champaign , 2012 .
Li G , Dong Zh Q , Li H N . Simplified collapse prevention evaluation for the reserve system of low-ductility steel concentrically braced frames [J]. Journal of Structural Engineering , 2018 , 144 ( 7 ): 04018071 .
Dong Zh Q . Seismic performance evaluation of steel concentrically braced frames based on reserve capacity [D]. Dalian : Dalian University of Technology , 2018 . (in Chinese)
Hines E M , Appel M E , Cheever P J . Collapse performance of low-ductility chevron braced steel frames in moderate seismic regions [J]. Engineering Journal(New York) , 2009 , 46 ( 3 ): 149 - 180 .
Hines E , Baise L , Swift S . Ground-motion suite selection for eastern north America [J]. Journal of Structural Engineering , 2011 , 137 ( 3 ): 358 - 366 .
Li G , Dong Zh Q , Li H N , et al . Seismic collapse analysis of concentrically-braced frames by the IDA method [J]. Advanced Steel Construction , 2017 , 13 ( 3 ): 273 - 293 .